Search for /globular/ clusters in M31. II - Photographic photometry of the candidates in a 70 arcmin square field centered in M31

Details Search for /globular/ clusters in M31. II - Photographic photometry of the candidates in a 70 arcmin square field centered in M31 Search for /globular/ clusters in M31. II - Photographic photometry of the candidates in a 70 arcmin square field centered in M31

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26as...47..451b&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 47, Mar. 1982, p. 451-461. Research supported by the Consiglio Nazionale del

Astronomy and Astrophysics

Astrophysics

30

Andromeda Galaxy, Astronomical Photography, Astronomical Photometry, Globular Clusters, Star Clusters, Galactic Structure, Hertzsprung-Russell Diagram, Star Distribution

Scientific paper

Globular cluster candidates previously classified as A and B are assigned B and V photographic magnitudes down to V values of 18.0, which in comparisons with other photographic and photoelectric data demonstrate the effects of centering errors and the influence of background during observations of such cases. The formula proposed by Moffat (1969) is used in the application of two-dimensional fits to the PDS data, which also permits the determination of a parameter related to the structural properties of each image. The distribution of the clusters shows a tail toward higher values of this parameter. It is found that clusters within 1-2 kpc from the nucleus of M31 have a mean parameter slightly smaller than that of the outer clusters, perhaps because of the influence of dynamical interactions close to the nuclear region of the galaxy.

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